Axispharm offers you high purity tert-butyl (7-aminoheptyl)carbamate CAS:99733-18-3 that can be used as a PROTAC linker in PROTAC synthesis and other conjugation applications. It has an alkane chain with a Boc protected amino group and a terminal amine. The Boc group can be deprotected under mild acidic conditions to form the free amine. Amine groups react with carboxylic acids, activated NHS esters, carbonyl groups (ketones, aldehydes), etc.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.